Fix conversion of variantlists to ArrayObjects

Fixes a crash in the qquickmultipointtoucharea test

Change-Id: Ic1ca5220e5e7a569e3cc499ba120296fb885d6c0
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Fix expected error message

Change-Id: I41ebd1506b0d1675cac1205d5fd8f60fd751a4aa
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>